It’s a day when hope triumphs over despair. Diwali, the “festival of lights,” will be celebrated at two Bay Area venues on Oct. 15. In Cupertino, the event will run from 10 a.m. to 5 p.m. at Memorial Park with performances, games and food. Details: Free admission, free parking at De Anza College. More information: http://cupertino-chamber.org/diwali. In Pleasanton, the event at the Alameda County fairgrounds will feature a mela (fair) from 11 a.m. to 11 p.m., evening fashion show, parade and lamp lighting, plus fireworks at 9 p.m. Details: Admission, $6; www.fogsv.org